Thanks for your answers;
Well... ok for caching, ok for ftp in squid, and ok for ftp
(passive-mode) menaged by backet filtering. Telnet is needed by an old
version of a "tickets remote ordering" software; it will be upgraded; now
I'll make it pass trought my filter as normal telnet to special ports.
So I think squid will be enough for me.
...and sorry for that annoyance, I thought that message was sent
in the mailing list... (ops!)
Bye all,
Marco